package com.sunnada.weixinService.main;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class CoreServlet extends HttpServlet {

	/** 
     * 确认请求来自微信服务器 
     */    
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		// 微信加密签名  
        String signature = request.getParameter("signature");  
        // 时间戳  
        String timestamp = request.getParameter("timestamp");  
        // 随机数  
        String nonce = request.getParameter("nonce");  
        // 随机字符串  
        String echostr = request.getParameter("echostr");  
  
        PrintWriter out = response.getWriter();  
        // 通过检验signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败  
        if (SignUtil.checkSignature(signature, timestamp, nonce)) { 
        	System.out.println("==========================" + "微信接入成功");
            out.print(echostr);  
        }  
        out.close();  
        out = null;  
	}

	/** 
     * 处理微信服务器发来的消息 
     */  
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		// TODO 消息的接收、处理、响应  
		// 将请求、响应的编码均设置为UTF-8（防止中文乱码）  
        request.setCharacterEncoding("UTF-8");  
        response.setCharacterEncoding("UTF-8");  
  
        // 调用核心业务类接收消息、处理消息  
        String respMessage = CoreService.processRequest(request);  
          
        // 响应消息  
        PrintWriter out = response.getWriter();  
        out.print(respMessage);  
        out.close();  
    }  
 }
